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Nubbin

Nubbin

(OP)
Can anyone explain what "nubbin" is as used in ASME Section VIII, Div. 1, Appendix 2?  Is there another text that provides good examples of a flange that has this component?

RE: Nubbin

Could you provide a paragraph reference?  I looked in the '89 Code and couldn't find it.

RE: Nubbin

A nubbin is just a small tooth obtained by machining on the joint contact area of a flange. This is a very detailed issue and is normally specified by joint manufacturers for use with specific types of joints.
You should find more in a good catalog or site of a joint manufacturer.



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